Remove "Other [Staff Only]" GitHub Issue template (#43913)

Release Notes:

- N/A

.github/ISSUE_TEMPLATE/99_other.yml

@@ -1,19 +0,0 @@
-name: Other [Staff Only]
-description: Zed Staff Only
-body:
-  - type: textarea
-    attributes:
-      label: Summary
-      value: |
-        <!-- Please insert a one line summary of the issue below -->
-        SUMMARY_SENTENCE_HERE
-
-        ### Description
-
-        IF YOU DO NOT WORK FOR ZED INDUSTRIES DO NOT CREATE ISSUES WITH THIS TEMPLATE.
-        THEY WILL BE AUTO-CLOSED AND MAY RESULT IN YOU BEING BANNED FROM THE ZED ISSUE TRACKER.
-
-        FEATURE REQUESTS / SUPPORT REQUESTS SHOULD BE OPENED AS DISCUSSIONS:
-          https://github.com/zed-industries/zed/discussions/new/choose
-    validations:
-      required: true